Eurybacteria
Eurybacteria is a taxon created by Cavalier-Smith, which includes several groups of Gram-negative bacteria. In this model, it is the ancestor of gram positive bacteria. Their endospores are characterized by producing and presenting external flagella or mobility by bacterial displacement.
Members
Specifically, it includes:- Fusobacteria. For example, Leptotrichia and Fusobacterium
- Togobacteria. For example, Thermotoga.